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Monthly food expenditures for families in Caloocan City average Php 4 500 with a standard deviation of Php 750. Assuming that the monthly food expenditures are normally distributed, what percentages of the expenditures are between Php 3 900 and Php 5 850?
Oranges chosen at random have a mean mass of 210 grams and a standard deviation of 35 grams. Assuming a normal distribution, what's the probability of choosing an orange with a mass between 170 grams and 250 grams?
find a power series solution of xy'=y
whenever horses a,b and c race together , their respective probabilities of winning are 0.3, 0.5 and 0.2. they race three times .
(a) Find the probability that the same horse wins all three races .
(b) Find the probability that a,b,,c each win one race.
9 boys and 2 girls are to be placed next to each other in the school ground for morning assembly. What is the probability that there are exactly 4 boys between the 2 girls?
In a Multiple Select Question, there are 5 options of which one or more can be correct. Let us define an event E that the option ‘A’ is correct. What is the cardinality of E?
A person predicts daily whether the price of stocks of wrist watch companies will go up or down. If his prediction on stock price of Titan is correct 4 times out of 8, for Rolex it is correct 2 times out of 4 and for Fossil it is correct 2 times out of 9, then what is the probability that at least two of his predictions are correct on a given day?
There are a total of 180 students who are part of badminton, table tennis and tennis team of the college. Of which 70% of students play table tennis, 10% play tennis and 60% play badminton. It is also noticed that all students who play tennis also play table tennis but not badminton. Now a student is selected at random, what is the probability that he/she is the part of table tennis team only?
Pramod goes to a shop to buy some clothes. Shopkeeper shows him 5 shirts, 6 pants and 13 t-shirts. If he selects three clothes at random, then find the probability that, randomly chosen clothes does not contain pant.
The chance that a student will clear the quiz-1 paper is 0.59 and the chance that he will clear both quiz-1 and quiz-2 papers is 0.17. The chance that he will clear at least one quiz paper is 0.74. What is the chance that he will clear quiz-2 paper?
